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Gas Generator G3512H

Maximum Continuous Rating

1515 ekW / 1505 ekW @1.0pf

Fuel Type

Natural Gas

Maximum Electrical Efficiency



From natural gas-fueled combined heat and power (CHP) systems and emergency power for facilities, to renewable biogas energy to support the local grid, or electricity generated from coal mine gases, Caterpillar has a wide range of reliable gas power solutions.



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  • Generator Set Specifications
    Spec Value
    Maximum Continuous Rating 1515 ekW / 1505 ekW @1.0pf
    Fuel Type Natural Gas
    Maximum Electrical Efficiency 44.90%
    Frequency 50 / 60 Hz
    RPM 1500 rpm
  • Engine Specifications
    Spec Value
    Engine Model G3512H
    Displacement 3574 in³
    Aspiration TA
    Bore 6.7 in
    Stroke 8.5 in
    Governor Type ADEM A4
  • Generator Set Dimensions
    Spec Value
    Length 223 in
    Width 76 in
    Height 91 in
    Dry Weight - Genset 31085 lb

Standard Equipment

Air Inlet

  • Package Mounted Air Cleaner with service indicator


  • Jacket water and SCAC thermostats
  • 2nd Stage CAT Flange
  • ANSI Class 150 JW Connection
  • Engine driven pumps for jacket water and aftercooler cooling

Control Panels

  • Dedicated customer wiring terminals

Control Panel

  • EMCP4.3


  • Dry exhaust manifolds insulated and shielded
  • Center section cooled turbocharger with Cat flanged outlet


  • High efficiency low voltage Cat generator, permanent magnet excitation, digital regulation, IP23 water ingress protection, & form wound construction.


  • Electric Starter


  • Paint - Caterpillar Yellow except rails and radiators gloss black
  • Crankshaft vibration damper and guard

Optional Equipment

Air Inlet

  • Mounting brackets and piping
  • Air cleaner with precleaner

Control Panels

  • Remote annunciator

Circuit Breakers

  • Frame mounting circuit breaker orientation
  • 2500A 3-pole IEC rated circuit breakers
  • Rear Mounted Circuit Breaker
  • 3000A/3200A/4000A UL100% Rated Masterpact circuit breaker (60 Hz only)
  • LSI Long-Time, LSI-P Long-Time, LSIG Long-Time, LSIG-P Long-Time,

Control Panel

  • Language Options
  • Cable Shroud Location
  • Engine failure relay
  • Discrete I/O module, 12 digital points, 8 'Form C' relay
  • 16 point/32 light annunciator with NFPA99-110/CSA282 configuration
  • Empty Upper Box Right/Left
  • Local Alarm module
  • Synchronization module
  • Cat Connect: Ethernet, satellite, or cell telematics
  • Local/Remote PC Monitorring
  • Right/Left/Rear Extension Box


  • Remote radiator for JW and SCAC circuits
  • 220V (50Hz), 240V (60Hz), 480V (60Hz) JW heater


  • Flexible fitting [305mm x 305mm (12in. X 12in.)] w/ 12 bolt-flanges
  • 406mm (16in.) sparking-arresting muffler with companion flange
  • Exhaust expander [250mm-329mm (10in-12in)]
  • 305mm (12 in.) flange
  • Muffler options
  • Elbow exhaust

Fuel System

  • 1/2" NPT gas train conduit connectors
  • 3, 0-100kPag 4-20mA gas train pressure sensors
  • Fuel Filter
  • Gas knockdown regulators


  • Digital Diagnostic tool
  • US Aid emblem


  • Generator air filter
  • Manual voltage control
  • Cable access box
  • RTD Monitorring
  • Bearing temperature detectors

Governing System

  • ADEM A4 4-20mA (0-5V) speed input


  • Battery with cables and rack
  • 24V Starting motors
  • 20A, 24VDC battery charger
  • 45A, 24V charging alternator (requires engine driven pumps)
  • Jacket water heater